either_dart 1.0.0

Error handler library for type-safe and easy work with errors on Dart and Flutter. Either is an alternative to Nullable value and Exceptions.

[1.0.0] - Dart 3 support

remove deprecated methods from Future[Either]

Either is now sealed - this gives you support pattern matching.

You now have an alternative for the fold and either

before:

final either = ...;

final result = either.fold(
  (left) => do something with left
  (right) => do something with right
);

after:

final either = ...;

switch (either) {
  case Left(value: final left):
    do something with left
  case Right(value: final right):
    do something with right
}

Thanks to @dballance for creating the issue

Also, you can still use:
either.isLeft - check either is left
either.isRight- check either is right

[0.4.0] - Update Future[Either].fold and Add Either.tryExcept

Provide more async flexible type support for FutureEither's fold operation.

Thanks to @lukasbalaz for creating the issue

add:

• tryExcept - A simple but powerful constructor for exception handling. Just specify the type of error you expect from the function and you will get Either<ExpectedError, RightType>

[0.3.0] - Add equality and hash override

Either now overrides equality and hash.

Thanks to @memishood for creating the issue

[0.2.0] - Update Future[Either]

Updated to support FutureOr<T> instead of Future<T>:

• Either:
  • thenAsync
  • thenLeftAsync
  • mapAsync
  • mapLeftAsync
• Future[Either]:
  • thenRight
  • thenLeft

Updated to support FutureOr<T> instead of T:

• Future[Either]:
  • mapRight
  • mapLeft

Mark deprecated (not delete):

• Future[Either].thenRightSync
• Future[Either].thenLeftSync
• Future[Either].mapRightAsync
• Future[Either].mapLeftAsync

The following methods were not needed after FutureOr support, so they are marked Deprecated.

[0.1.4] - Update docs

Update:

• Readme

(just this)

[0.1.3] - Additional functionality

Added:

• thenLeft
• thenLeftAsync
• similiar methods for FutureEither<L, R> extension

[0.1.2] - Fixs

Fixed:

• remove the lint warning from Either.tryCatch

[0.1.0-nullsafety.2] - Additional functionality and fixes

Added:

• mapLeftAsync
• FutureEither<L, R> extension

Fixed:

• change the naming of the async methods of Either class

Changes Either:

• asyncThen -> thenAsync
• asyncMap -> mapAsync

[0.1.0-nullsafety.1] - Additional functionality

Added:

• mapLeft

Fixed:

• documentation

[0.1.0-nullsafety.0] - Additional functionality

Added:

• null-safety
• swap method
• const constructor for Left and Right

Changed:

• rename unite to fold

[0.0.5] - Additional functionality

Added:

• asyncMap
• asyncThen

[0.0.4] - Bug fixs

Fixed:

• Not convenient use with autocomplete

[0.0.3] - Additional functionality and testing

Added:

• Unit test
• Lazy condition
• Flutter example

[0.0.2] - Additional functionality and testing

Added:

• Unit test
• creators by:
  • condition
  • exception

Fixed:

• pubspec
• Readme

[0.0.1] - The base implementation either.

Added:

• Base implementation
• Unit test
• Example with flutter